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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >parameters</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 9.2.24 Documentation" HREF="index.html"><LINK REL="UP" TITLE="The Information Schema" HREF="information-schema.html"><LINK REL="PREVIOUS" TITLE="key_column_usage" HREF="infoschema-key-column-usage.html"><LINK REL="NEXT" TITLE="referential_constraints" HREF="infoschema-referential-constraints.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2017-11-06T22:43:11"></HEAD ><BODY CLASS="SECT1" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.2.24 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="key_column_usage" HREF="infoschema-key-column-usage.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="information-schema.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" >Chapter 34. The Information Schema</TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="referential_constraints" HREF="infoschema-referential-constraints.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="INFOSCHEMA-PARAMETERS" >34.32. <TT CLASS="LITERAL" >parameters</TT ></A ></H1 ><P > The view <TT CLASS="LITERAL" >parameters</TT > contains information about the parameters (arguments) of all functions in the current database. Only those functions are shown that the current user has access to (by way of being the owner or having some privilege). </P ><DIV CLASS="TABLE" ><A NAME="AEN49070" ></A ><P ><B >Table 34-30. <TT CLASS="LITERAL" >parameters</TT > Columns</B ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><COL><THEAD ><TR ><TH >Name</TH ><TH >Data Type</TH ><TH >Description</TH ></TR ></THEAD ><TBODY ><TR ><TD ><TT CLASS="LITERAL" >specific_catalog</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD >Name of the database containing the function (always the current database)</TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >specific_schema</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD >Name of the schema containing the function</TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >specific_name</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD > The <SPAN CLASS="QUOTE" >"specific name"</SPAN > of the function. See <A HREF="infoschema-routines.html" >Section 34.40</A > for more information. </TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >ordinal_position</TT ></TD ><TD ><TT CLASS="TYPE" >cardinal_number</TT ></TD ><TD > Ordinal position of the parameter in the argument list of the function (count starts at 1) </TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >parameter_mode</TT ></TD ><TD ><TT CLASS="TYPE" >character_data</TT ></TD ><TD > <TT CLASS="LITERAL" >IN</TT > for input parameter, <TT CLASS="LITERAL" >OUT</TT > for output parameter, and <TT CLASS="LITERAL" >INOUT</TT > for input/output parameter. </TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >is_result</TT ></TD ><TD ><TT CLASS="TYPE" >yes_or_no</TT ></TD ><TD >Applies to a feature not available in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >as_locator</TT ></TD ><TD ><TT CLASS="TYPE" >yes_or_no</TT ></TD ><TD >Applies to a feature not available in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >parameter_name</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD >Name of the parameter, or null if the parameter has no name</TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >data_type</TT ></TD ><TD ><TT CLASS="TYPE" >character_data</TT ></TD ><TD > Data type of the parameter, if it is a built-in type, or <TT CLASS="LITERAL" >ARRAY</TT > if it is some array (in that case, see the view <TT CLASS="LITERAL" >element_types</TT >), else <TT CLASS="LITERAL" >USER-DEFINED</TT > (in that case, the type is identified in <TT CLASS="LITERAL" >udt_name</TT > and associated columns). </TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >character_maximum_length</TT ></TD ><TD ><TT CLASS="TYPE" >cardinal_number</TT ></TD ><TD >Always null, since this information is not applied to parameter data types in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >character_octet_length</TT ></TD ><TD ><TT CLASS="TYPE" >cardinal_number</TT ></TD ><TD >Always null, since this information is not applied to parameter data types in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >character_set_catalog</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD >Applies to a feature not available in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >character_set_schema</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD >Applies to a feature not available in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >character_set_name</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD >Applies to a feature not available in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >collation_catalog</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD >Always null, since this information is not applied to parameter data types in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >collation_schema</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD >Always null, since this information is not applied to parameter data types in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >collation_name</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD >Always null, since this information is not applied to parameter data types in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >numeric_precision</TT ></TD ><TD ><TT CLASS="TYPE" >cardinal_number</TT ></TD ><TD >Always null, since this information is not applied to parameter data types in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >numeric_precision_radix</TT ></TD ><TD ><TT CLASS="TYPE" >cardinal_number</TT ></TD ><TD >Always null, since this information is not applied to parameter data types in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >numeric_scale</TT ></TD ><TD ><TT CLASS="TYPE" >cardinal_number</TT ></TD ><TD >Always null, since this information is not applied to parameter data types in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >datetime_precision</TT ></TD ><TD ><TT CLASS="TYPE" >cardinal_number</TT ></TD ><TD >Always null, since this information is not applied to parameter data types in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >interval_type</TT ></TD ><TD ><TT CLASS="TYPE" >character_data</TT ></TD ><TD >Always null, since this information is not applied to parameter data types in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >interval_precision</TT ></TD ><TD ><TT CLASS="TYPE" >cardinal_number</TT ></TD ><TD >Always null, since this information is not applied to parameter data types in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >udt_catalog</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD > Name of the database that the data type of the parameter is defined in (always the current database) </TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >udt_schema</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD > Name of the schema that the data type of the parameter is defined in </TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >udt_name</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD > Name of the data type of the parameter </TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >scope_catalog</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD >Applies to a feature not available in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >scope_schema</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD >Applies to a feature not available in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >scope_name</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD >Applies to a feature not available in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >maximum_cardinality</TT ></TD ><TD ><TT CLASS="TYPE" >cardinal_number</TT ></TD ><TD >Always null, because arrays always have unlimited maximum cardinality in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN ></TD ></TR ><TR ><TD ><TT CLASS="LITERAL" >dtd_identifier</TT ></TD ><TD ><TT CLASS="TYPE" >sql_identifier</TT ></TD ><TD > An identifier of the data type descriptor of the parameter, unique among the data type descriptors pertaining to the function. This is mainly useful for joining with other instances of such identifiers. (The specific format of the identifier is not defined and not guaranteed to remain the same in future versions.) </TD ></TR ></TBODY ></TABLE ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="infoschema-key-column-usage.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="infoschema-referential-constraints.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><TT CLASS="LITERAL" >key_column_usage</TT ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="information-schema.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><TT CLASS="LITERAL" >referential_constraints</TT ></TD ></TR ></TABLE ></DIV ></BODY ></HTML >